Machine-made sand concrete water permeable brick and preparation method thereof

The invention discloses a machine-made sand concrete water permeable brick. The machine-made sand concrete water permeable brick is prepared from the following raw materials in parts by weight: 60-75 parts of machine-made sand, 8.5-12 parts of cement, 1.4-2.4 parts of silica fume, 2.8-4.8 parts of micro silica fume, 2.8-4.8 parts of mineral powder, 0.22-0.38 part of a water reducing agent and 3.0-5.0 parts of water. The invention also provides a preparation method of the machine-made sand concrete water permeable brick. According to the preparation method disclosed by the invention, high-strength cement slurry is adopted to coat machine-made sand prepared from limestone; UHPC ultrahigh-performance cement slurry is adopted due to the technical performance of high strength and high hardness, so that the defect of poor hardness of machine-made sand is solved. The prepared machine-made sand concrete water permeable brick has favorable water permeability, good abrasion resistance and strong strength. 本发明公开了一种机制山砂混